glioma glial tumor neoplasm of neuroglia neuroglial tumor tumor of neuroglia A benign or malignant brain and spinal cord tumor that arises from glial cells (astrocytes, oligodendrocytes, ependymal cells). Tumors that arise from astrocytes are called astrocytic tumors or astrocytomas. Tumors that arise from oligodendrocytes are called oligodendroglial tumors. Tumors that arise from ependymal cells are called ependymomas. http://www.case.edu/EpSO.owl#Glioma GARD:0006513 UMLS:C0017638 MONDO:0021042 glial neoplasm MESH:D005910 SCTID:393564001 neoplasm of the neuroglia NCIT:C3059 glioma tumor of the neuroglia neuroglial neoplasm neuroepithelial neoplasm